I believe what Randy is suggesting is that your M80s were bottoming out not your subwoofer.
Ahhh... well if you're right about that, then all I have to say is this.... negative. I ruled that possibility out almost immediatelly. I disconnected every speaker except the EP800 and ran the 'Cave' scene among other extreme LFE movie sequences and the EP800 was 100% the culprit. And let me also say that I've never heard the M80's bottom out. I can't speak for how well they perform with a reciever pushing them because when I had the Denon hooked up to them I never went past zero on the volume knob, because they started to sound strained.
But I can say that with the Emotiva supplying the full 400 watts that they're rated to handle, I can not bottom them out. And I've pushed them, trust me. Those things are the real poop!
